Method

The Reserved Instance Marketplace matches sellers who want to resell Reserved Instance
capacity that they no longer need with buyers who want to purchase additional capacity.
Reserved Instances bought and sold through the Reserved Instance Marketplace work
like any other Reserved Instances.

As a seller, you choose to list some or all of your Reserved Instances, and you specify
the upfront price to receive for them. Your Reserved Instances are then listed in
the Reserved Instance Marketplace and are available for purchase.

As a buyer, you specify the configuration of the Reserved Instance to purchase, and
the Marketplace matches what you're searching for with what's available. The Marketplace
first sells the lowest priced Reserved Instances to you, and continues to sell available
Reserved Instance listings to you until your demand is met. You are charged based
on the total price of all of the listings that you purchase.